Bolt anchor



ck. 2, 1623. I 1,469,668

J. KARITZKY BOLT ANCHOR.

Filed April 12. 1922- Hum 71 7 r VET 5 7 3 By I (5;,

(ATTORNEY inlthegfr ii f receSees"fWithi 1i ".th'e cone, there y v e n'gl'the iece's y p y 7 ring additibnel' members to-held the parts'to p c n ;h dlin end n 1 V JOHNKEAEITZKY;YCF ,GABWOOD, iVEWLJEjIiSEYQ ssieiiO Td fiEWiBLiAiLIQ; 7

EGUTQR O H NR -B NEWHALL sR mcEAsp Pieteliied c t. 2, 1 923 I I 'i I BOLT NGHGBQ Be it know i that LJOHN ICKRITZKAY, a

citizen ofrthe' United; Statesfresiding at Gerwoedjin iihe'eoiintyfif Uhibn and State of eTV' Je'rs ey, hiive' made ertaili new and usflil Improvements, in B'cflt" Anchors; of

Whieh the 'fellojifing is 25 speeifieiitioii taken in cen'nee t in the faeee i panying drawg 'IM infeli tfienfi elates 6 a 'bolhenehbrifi thefexpz'iheible Shield igj'provided' with V afcqz ieehborie.lei d'an xpandi gmember: 3 preferably in the I form of a cemeal nut and prfefablyffreefirom hig's b1" projecq mins]. The'expizindingjmember' is ada ted tog ther ri "be? 'i i said: su' iae 's being preferably with' dne '01 more'lengitudiiiallyiexfiefiding tudinally extending 5105 or sl'ots' near r I fco -65 the inneif endofibhe shield'thahiexthe oiiterj h re a opee n erspr aein offthe'shield, '7 'iirhich-wq ld permit the expandingmember cieiit strength 'mipreyeni; fractil 'e of ru ture y shield, Wheriitis expended in;

' ierials sefydifirent strength; the expandingmme hardness;ape-les ithe Shield f sdmle ldiictilefmeterial, as ahimimore or" less, intojthe ifireggula'rities j and d etogether ageiris'fl'aecidenta dig n operatipii y'oids of the wall of the-hOIeLjThe' expand- 111g Gone is formed of some harder material,

as for example, iron, which may 0i" may net i be ge{1i7ai1ized. I i. My "invention further relates to fofrfiii1g5-f00 as fOi-"e'Xamp'Ie by casting, oneor more 'titsf iipon theexte 'ior sin'feee Ofthe expansible j shield and forming e cooperating h ole' or" I hqleeon' the ext ior surface of the cone orq '1 i e i other'expandlii igmemben {In assembling the i in 'the 'ejqne; thereby 1eekingthe"-shie1dand 5 inyielitierii f i rthe relates to" corihbinations, details'of?consfiruetion; and artieles of manufacture, which will be mope fully hei ein'afteif deseribed 'arid pgihtedbut I i I in" he elaims. .2 1 i I; the a ceompanyin'g fdi'awings' the same v ferencie -,-n1imera1s v refer to similar paits) intheseverfl figufesx x' -1: 5 Fig, 1 is e vertical s ec fen showin'ga-my bolt 'anchofessembled' and in operative positiohawithin a; hOle ingfthewell ready. to; be

expanded; i

Fig. 2 is .a vertical section, similar {te Fi'gJ [15: showing the 'pa-rts wheir'exp ended 1 11 Fig, '13: is; a, ertical f section similar eto Fig.12, Sh0Wii1g the same- 10011; iuichbr lf'ex isap ie membep, shown as ja cone pairtljiiih long-ii- 7:

. @15 -ri ri o my inventn, ithesbee 01d I useffiii expansion s hieldnfei'med f awrplu surface of the hole '19.

The exterior surface of the shield 1, adjathe machine bolt G'risPiiSSGd through '.;che,

opening in the work 16 until its threads 5 cooperate with the female threads 1in the cone 2.

By rotating the head 2-1::ofthe bolt the cone 2 iscaused-to move: up the flaring or conical axial bore Sand in doing so that portion of the metal of the shield which has been pressed into the recesses 18, 18 in the cone will either beforced out of said recesses or be broken off depending upon the material employed. In a propen sized hole 19, the fins 15, '.W1ll simply stretch and permit the shield to be firmly:

pressed outward into eng'agement with the It is considered good practice by engineers and mechanics, both fromthestandpointof workmanship and economy to drill the hole of as small a diameter as possible to cause the shield to fit snugly in the hole before,

expanding. In an accurately drilled hole immediate and powerful contact is haddoctween the exterior of the shield and thewalls of the hole when the threaded bolt starts to draw the nut outwardly c'ompressing the ductile metal of the shield 1 between the advancing nut and the work at the sur- This causesthe lead or ductile shield to flow intosthe interstices found in the wall surrounding the hole, Such face of the hole.

interstices are formed in" the walls of, Miles drilled in manufactured stone or brick and i in natural stone by the dislodgement'of pebbles, coarse sand and hard particles cona Jan expansible duct le shleld' provided w th compressible ductile locking means to enstituting the mass. V

Used in an accurately drilled 'hole the ductile shield is compressed or shortened be.

tween the nut and the work and at 'thes'ame' time the diameter of theshield is increased:

uniformly in an, directions limited only by its powerful Contact with thefiontour of the hole. Under such conditions the fins 15,15 will simplystretch and will not ordinarily be fractured, see Fig. 2.

YVhen, however, a hole is drilled oversize,

V Fig. 3, the shortening of the shield and the! increasing of its diameter iscarried'to va greater degree thanin the closer fitting hole. and. the cone nut2 is drawn furthertoward I the work 16. Under suchfconditions the 1 expansion of the shield is facilitated bythe fracturing of the fins 15, 15, see Fig. 3.

In either a close fitting hole or an over-- size hole the slots perform the important function of facilitating the expansion of the shield by permitting stretching of the fins in a close fitting holeand' by permitting them to be broken in an oversized hole. It the fins were omitted the separated end of the shield would be forced apart in tranSitallowingthe nut to drop out, W'iththe dis-i advantages previously pointed out;

the hole 19 in the wall orother suitable sup.-

exaggerated; V

7 By my invent on in'which I re erably.

employ a-ductile shieldl, the powerful expansionexerted by the iron conical nut 3,

causes themetal of the shield to flow morev :or less as shown in Figs. 2 and 3, filling up all the inequalities or voids on the interior of the hole 19. By forcing the metal to flow 7. into these inequalities I obtain aparti'cular strong union or-hold with thewallor other suitable support. 7

Having thus described this invention in f 'connection"with an illustrative embodiment thereof, to the detailsof which I do not desire to be limited, whatis claimed as new 'iand'what is. desired to secure by Letters 1 1 Patent is set forth; in theappended claims. 7

What I claim is: i i g ll An assembledbolt anchor comprising gage with and. hold'expandi-ng means, ex-

compressible ductile locking means, so that the parts will not become separated i a handling storage. and transportation.

119 5 an expansible ductile shield providedwithi compressible ductile locking -m'eanswto en-I 2. An assemb-ledbolt anchor comprising gage with and hold an expandin'gcone of pressible vductile'locking means so that the 3. An assembled bolt anchor'comprising and breakable means holding the exp-anding memberwithin the 'expansible shield and adapted to-be broken only when theexpandf' ing member expands the shield;

lan expansible shield, an expanding member, r

4. An assembled bolt: anchor comprising i an exp'ansible shield, an expanding member,

.2 5 and? ductile means'holding'the' expanding].

member within; the expansible shield and adapted to be compressed'only when the expanding member expands the shield.

An assembled machine expansioncom-j 11o parts-will not become separated in ha-ndling,, storage and transportation.

prisingan expansibles'hield havingan in f terior conicalfbore, an expanding cone'mounted in thebo re, and ,ductile'ine-ansengaging, with the cone and the shield adapted to i hold the parts together so that they will not become separated in handling, storage and transportation. 7

fi An'asselnbled bolt anchor eompnsing a ductlle SlllBldpTUVlClGCl \vlth one 01 more tits, an expanding member mounted in the shield and adapted to be held therein by said tits s0 l'het the parts will not become separated in handling, storage and trans- V portation.

-7. -An assembled bolt anchor comprising a ductlle ShlBld. provlded w1th one or more 1,4eegees JOHN KARITZKYQ Witnesses F KARITZKY, JOHN L. GOLON. 

